From 4dbd55cb96ca68e96e9b5f4b38891305c5ef1b13 Mon Sep 17 00:00:00 2001
From: mwilliams03 <mark.mwilliams@gmail.com>
Date: Sun, 18 Oct 2015 17:07:24 -0700
Subject: [PATCH] New overlay for PiScreen2r

---
 arch/arm/boot/dts/overlays/Makefile               |   1 +
 arch/arm/boot/dts/overlays/README                 |  14 +++
 arch/arm/boot/dts/overlays/piscreen2r-overlay.dts | 100 ++++++++++++++++++++++
 3 files changed, 115 insertions(+)
 create mode 100644 arch/arm/boot/dts/overlays/piscreen2r-overlay.dts

--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -35,6 +35,7 @@ dtb-$(RPI_DT_OVERLAYS) += mcp2515-can1-o
 dtb-$(RPI_DT_OVERLAYS) += mmc-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += mz61581-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += piscreen-overlay.dtb
+dtb-$(RPI_DT_OVERLAYS) += piscreen2r-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += pitft28-resistive-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += pps-gpio-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += pwm-overlay.dtb
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -425,6 +425,20 @@ Params: speed                    Display
         xohms                    Touchpanel sensitivity (X-plate resistance)
 
 
+Name:   piscreen2r
+Info:   PiScreen 2 with resistive TP display by OzzMaker.com
+Load:   dtoverlay=piscreen2r,<param>=<val>
+Params: speed                    Display SPI bus speed
+
+        rotate                   Display rotation {0,90,180,270}
+
+        fps                      Delay between frame updates
+
+        debug                    Debug output level {0-7}
+
+        xohms                    Touchpanel sensitivity (X-plate resistance)
+
+
 Name:   pitft28-resistive
 Info:   Adafruit PiTFT 2.8" resistive touch screen
 Load:   dtoverlay=pitft28-resistive,<param>=<val>
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/piscreen2r-overlay.dts
@@ -0,0 +1,100 @@
+ /*
+ * Device Tree overlay for PiScreen2 3.5" TFT with resistive touch  by Ozzmaker.com
+ *
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
+
+	fragment@0 {
+		target = <&spi0>;
+		__overlay__ {
+			status = "okay";
+
+			spidev@0{
+				status = "disabled";
+			};
+
+			spidev@1{
+				status = "disabled";
+			};
+		};
+	};
+
+	fragment@1 {
+		target = <&gpio>;
+		__overlay__ {
+			piscreen2_pins: piscreen2_pins {
+				brcm,pins = <17 25 24 22>;
+				brcm,function = <0 1 1 1>; /* in out out out */
+			};
+		};
+	};
+
+	fragment@2 {
+		target = <&spi0>;
+		__overlay__ {
+			/* needed to avoid dtc warning */
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			piscreen2: piscreen2@0{
+				compatible = "ilitek,ili9486";
+				reg = <0>;
+				pinctrl-names = "default";
+				pinctrl-0 = <&piscreen2_pins>;
+				bgr;
+				spi-max-frequency = <64000000>;
+				rotate = <90>;
+				fps = <30>;
+				buswidth = <8>;
+				regwidth = <16>;
+				txbuflen = <32768>;
+				reset-gpios = <&gpio 25 0>;
+				dc-gpios = <&gpio 24 0>;
+				led-gpios = <&gpio 22 1>;
+				debug = <0>;
+
+                                init = <0x10000b0 0x00
+                                        0x1000011
+                                        0x20000ff
+                                        0x100003a 0x55
+                                        0x1000036 0x28
+                                        0x10000c0 0x11 0x09
+                                        0x10000c1 0x41
+                                        0x10000c5 0x00 0x00 0x00 0x00
+                                        0x10000b6 0x00 0x02
+                                        0x10000f7 0xa9 0x51 0x2c 0x2
+                                        0x10000be 0x00 0x04
+                                        0x10000e9 0x00
+                                        0x1000011
+                                        0x1000029>;
+
+			};
+
+			piscreen2_ts: piscreen2-ts@1 {
+				compatible = "ti,ads7846";
+				reg = <1>;
+
+				spi-max-frequency = <2000000>;
+				interrupts = <17 2>; /* high-to-low edge triggered */
+				interrupt-parent = <&gpio>;
+				pendown-gpio = <&gpio 17 0>;
+				ti,swap-xy;
+				ti,x-plate-ohms = /bits/ 16 <100>;
+				ti,pressure-max = /bits/ 16 <255>;
+			};
+		};
+	};
+	__overrides__ {
+		speed =		<&piscreen2>,"spi-max-frequency:0";
+		rotate =	<&piscreen2>,"rotate:0";
+		fps =		<&piscreen2>,"fps:0";
+		debug =		<&piscreen2>,"debug:0";
+		xohms =		<&piscreen2_ts>,"ti,x-plate-ohms;0";
+	};
+};
+
